CN100358337C - Two stage synchronous controlling method for multi-player digital film playing system - Google Patents
Two stage synchronous controlling method for multi-player digital film playing system Download PDFInfo
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- CN100358337C CN100358337C CNB2005100284150A CN200510028415A CN100358337C CN 100358337 C CN100358337 C CN 100358337C CN B2005100284150 A CNB2005100284150 A CN B2005100284150A CN 200510028415 A CN200510028415 A CN 200510028415A CN 100358337 C CN100358337 C CN 100358337C
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Abstract
The present invention relates to a two-level synchronous control method for a multiplayer digital movie playing system in the digital movie technical field. When receiving an instruction for playing an assigned movie, a synchronous controller sends a playing instruction to the players via communication links. The players receiving the instruction start a display preparing process, read movie data from a storing medium, decodes the data and fills the decoded data into a pre-display buffer zone so as to enter the display preparing state to realize rough synchronization. The synchronous controller transmits synchronous trigger signals to the players via synchronous transmission circuits; after receiving the synchronous trigger signals, the players immediately display the first image of the pre-display buffer zone and finish the successive preparing work of the following movie data from reading from the medium, decoding to filling the data into the zone so as to enter the continuous playing state. Under the control of the synchronous trigger signals, the present invention realizes the accurate playing synchronization between the players.
Description
Technical field
The present invention relates to a kind of control method of digital movie technical field.In particular, be a kind of two stage synchronous controlling method for multi-player digital film playing system.
Background technology
Ring curtain, spherical screen stereoscopic film are the interior on a large scale all special film presentation systems of scenery of a kind of energy performance.When watching this film, people stand in the middle section of auditorium, by around around wide picture surround, add and the cooperating of the corresponding to omnibearing stereo sound effective value of substance film, can produce extremely strong sense on the spot in person.Popular in the world this type of wider film mostly is the movie system that adopts many films at present.Once the someone proposed the method for synchronous based on the Circamara system of film.In the method, during photography, need to use the special video camera that can guarantee many film synchronous operations; During projection, need to use many projectors, and guarantee many projectors and the chain synchronous operation of 1 (or many) sound reproducing equipment by the electronic interlocking synchro system; Starting simultaneously, run-in synchronism, shutdown simultaneously.This system has realized the Synchronization Control of many cinematographic projectors more accurately, has obtained using widely in based on the ring curtain of film, spherical screen stereoscopic film system.The digital movie technology is called as the relay shadow from noiseless to sound, black and white after colour, the third technical revolution of filmdom.In some special digital movie forms, as encircle digital cinema playback systems such as curtain, ball curtain, solid and still need form by many digital movie playback equipments, but since know-why totally different, inapplicable this type of digital movie of the Circamara system of traditional many films and electronic interlocking synchronization mechanism.
Find through retrieval prior art, Chinese patent application number: 03129411.1, patent name: the synchronous liquid crystal display Play System of a kind of digital versatile disc all-in-one, the liquid crystal display Play System of optical digital disk all-in-one in this patent, and synchronous broadcast method based on many DVD player of infrared radio transceiver has been proposed.The synchronisation control means based on the infrared radio transceiver of this system can be realized thicker synchronous playing, only be applicable to the application places of synchronous less demanding the small screen, inapplicable ring curtain, ball curtain, three-dimensional film etc. require the digital cinema playback system of fine synchronization.In further retrieving, do not find the identical or similar bibliographical information of theme any and of the present invention as yet.
Summary of the invention
The objective of the invention is provides a kind of two stage synchronous controlling method for multi-player digital film playing system at the deficiencies in the prior art and defective, makes it utilize thick, smart two-stage Synchronization Control, realizes synchronous playing accurately.
The present invention is achieved by the following technical solutions, multi-player digital film playing system of the present invention comprises the communication link and the synchronizing signal transmission circuit of at least 2 digital film players, isochronous controller, connection film player and isochronous controller, the two stage synchronous controlling method of this system, step is as follows:
Synchronously thick: isochronous controller receives operational order by man-machine interface, and when receiving the instruction of playing the appointment film, isochronous controller sends the order of playing given content by communication link to each digital film player.The communication link here can be wireless transceiver system, ethernet network, serial line interface etc., and it is not limited to above listed communication link form.Each player that receives this order starts demonstration preparation process.In this process, player is finished from storage medium and is read certain cinematic data, decodes, and the data behind at least one frame decoding are inserted pre-display buffer, thereby enter the demonstration readiness, realizes synchronously thick.Before digital cinema presentation is play continuously, at first to set up slightly synchronously, thick synchronous foundation is the basis of realizing fine synchronization control.
Synchronously smart: isochronous controller passes through the synchronous transmission circuit to each player transmitting synchronous triggering signal, this signal form can comprise periodically clock, trigger impulse, triggering level etc., it is not limited to above listed form, and can comprise the combination in any of above various signal forms.After receiving synchronous triggering signal, each player shows first two field picture of pre-display buffer immediately, and when the next frame image demonstration time arrives, finish the subsequent movies data, thereby enter continuous broadcast state from the reading, decode and decoded data are inserted the preparation of pre-display buffer of storage medium.Under the control of synchronous triggering signal, realize playing between each player precisely synchronously.
The inventive method has control flexibly, the characteristics that method is simple and easy to realize.This method can be selected thick between many players, smart two-stage Synchronization Control flexibly according to the needs of real figure film Play System application.Based on synchronisation control means of the present invention, multiple digital film player can encircle the curtain digital cinema playback systems for 180 °, 270 °, 360 ° according to the coverage of film image resolution and screen and the different formations of angle; Also can constitute curtain, ball curtain and three-dimensional digit film Play System up and down.Such digital movie form is compared with common film has the characteristics spectacular, spectacular, that telepresenc is strong.Can be applied in the projects such as monster fair, tourism, propaganda and amusement.
Description of drawings
The multi-player digital film playing system structured flowchart that Fig. 1 embodiment of the invention adopts
The flow chart (one) of Fig. 2 two-stage method for synchronous of the present invention
The flow chart (two) of Fig. 3 two-stage method for synchronous of the present invention
Embodiment
Below will describe embodiments of the invention in detail further combined with accompanying drawing.It should be noted, below be going through of embodiment, is only used for deepening the understanding of the present invention, is not to limit the invention to this scope.
Embodiment 1
What present embodiment adopted is a digital Circamara player.In native system, comprise 9 identical high definition digital film players 4, an isochronous controller 1.Isochronous controller 1 and 9 high definition digital film players 4 are connected on same the ethernet concentrator by Ethernet interface separately.Ethernet cable and ethernet concentrator have constituted the communication link 2 between central controller and 9 the high definition digital film players 4.Synchronizing signal transmission circuit 3 adopts the LVDS mode to connect isochronous controller 1 and high definition digital film player 4.Isochronous controller 1 transmits clock signal and synchronous triggering signal of one-period property to arbitrary high definition digital film player 4 by synchronizing signal transmission circuit 3.Each high definition digital film player 4 shows reference clock by phase-locked generation this locality with this periodic clock signal as a reference.Because based on identical reference clock, so this locality of each high definition digital film player 4 shows between the reference clock to have synchronized relation.
The Synchronization Control of present embodiment comprises following concrete steps: see Fig. 2:
(1) isochronous controller 1 sends the order of playing given contents to 9 high definition digital film players 4 successively or in the mode of broadcasting;
(2) each high definition digital film player 4 is being received the preparation of playing after this order, comprise from storage medium and read cinematic data, decoding and the decoded data of at least one frame are inserted pre-display buffer, enter the demonstration readiness, realize that the first order is slightly synchronous;
(3) enter show readiness after, high definition digital film player 4 sends a feedback report to isochronous controller 1, it has entered the demonstration readiness to inform isochronous controller 1;
(4) after receiving that all high definition digital film players 4 enter the demonstration readiness, isochronous controller 1 sends a synchronous triggering signal by synchronizing signal transmission circuit 3 to each high definition digital film player 4;
(5) receive this synchronous triggering signal after, each high definition digital film player 4 is presented at first two field picture of pre-display buffer on separately the screen immediately, and always before the follow-up demonstration time arrives, finishes all preparations that successive image shows.So circulation enters continuous broadcast state, realizes that the second level is synchronously smart.
A kind of interchangeable Synchronization Control comprises following concrete steps in the present embodiment: see Fig. 3:
(1) isochronous controller 1 sends the order of playing given contents to 9 high definition digital film players 4 successively or in the mode of broadcasting;
(2) each high definition digital film player 4 is being received the preparation of playing after this order, comprise from storage medium and read cinematic data, decoding and the decoded data of at least one frame are inserted pre-display buffer, enter the demonstration readiness, realize that the first order is slightly synchronous;
(3) isochronous controller 1 is waited for the sufficiently long time, enters the demonstration readiness to guarantee all high definition digital film players 4;
(4) isochronous controller 1 sends a synchronous triggering signal by synchronizing signal transmission circuit 3 to each high definition digital film player 4;
(5) receive this synchronous triggering signal after, each high definition digital film player 4 is presented at first two field picture of pre-display buffer on separately the screen immediately, and always before the follow-up demonstration time brings, finishes all preparations that successive image shows.So circulation enters continuous broadcast state, realizes that the second level is synchronously smart.
Because this locality of each high definition digital film player 4 shows that reference clock has synchronized relation, so the demonstration in playing process deviation can not occur again, can guarantee to show synchronously accurately.
Embodiment 2
What present embodiment adopted is a digital Circamara player.In native system, comprise 9 identical high definition digital film players 4, an isochronous controller 1.Isochronous controller 1 and 9 high definition digital film players 4 are connected on same the ethernet concentrator by Ethernet interface separately.Ethernet cable and ethernet concentrator have constituted the communication link 2 between central controller and 9 the high definition digital film players 4.Synchronizing signal transmission circuit 3 adopts the LVDS mode to connect isochronous controller 1 and high definition digital film player 4.Isochronous controller 1 only transmits a synchronous triggering signal by synchronizing signal transmission circuit 3 to arbitrary high definition digital film player 4.Each high definition digital film player 4 independent this locality that produce shows reference clock, so each high definition digital film player 4 produces the local synchronized relation that does not have strictness between the reference clock that shows.
Present embodiment can adopt with embodiment 1 in identical Synchronization Control flow process.
Because producing local the demonstration, each high clear degree digital film player 4 do not have strict synchronized relation between the reference clock, although so when beginning to play, the demonstration time has been carried out accurate alignment, but skew along with the time, between the demonstration time of each high definition digital film player 4 still deviation can appear, but as long as each high definition digital film player 4 independent frequency error that produce local demonstration reference clock is controlled on the lower level, in limited reproduction time, can guarantee that still the demonstration between each high definition digital film player 4 does not occur perceptible asynchronous.
The above only is a specific embodiment of realizing the best of the present invention, and only is illustrated with ring curtain digital film player.But for correct understanding of the present invention should be that the present invention is not limited to this application-specific of ring curtain digital film player, finishes the multi-player digital film playing system that film is play jointly but should contain a plurality of players of any use.Simultaneously, the present invention also should not be understood that above-described specific Synchronization Control flow process, realizes all possible variant flow process of similar secondary Synchronization Control in the multi-player digital film playing system but covered.
Claims (3)
1, a kind of two stage synchronous controlling method for multi-player digital film playing system is characterized in that, step is as follows:
Synchronously thick: isochronous controller receives operational order by man-machine interface, when receiving the instruction of playing the appointment film, isochronous controller sends the order of playing given content by communication link to each digital film player, and each player that receives this order starts demonstration preparation process; In this process, player is finished from storage medium and is read cinematic data, decodes, and the data behind at least one frame decoding are inserted pre-display buffer, thereby enter the demonstration readiness, realizes synchronously thick;
Synchronously smart: isochronous controller passes through the synchronous transmission circuit to each player transmitting synchronous triggering signal, after receiving synchronous triggering signal, each player shows first two field picture of pre-display buffer immediately, and before arriving, finishes the next frame image demonstration time subsequent movies data reading, decoding and decoded data are inserted the preparation of pre-display buffer from storage medium, thereby enter continuous broadcast state, under the control of synchronous triggering signal, realize playing between each player precisely synchronously;
Before digital cinema presentation is play continuously, at first to set up slightly synchronously, thick synchronous foundation is the basis of realizing fine synchronization control.
2, two stage synchronous controlling method for multi-player digital film playing system according to claim 1 is characterized in that, Synchronization Control comprises following concrete steps:
(1) isochronous controller sends the order of playing given content successively or in the mode of broadcasting to digital film player;
(2) each digital film player is being received the preparation of playing after this order, comprise from storage medium and read cinematic data, decoding and the decoded data of at least one frame are inserted pre-display buffer, enter the demonstration readiness, realize that the first order is slightly synchronous;
(3) enter show readiness after, digital film player sends a feedback report to isochronous controller, it has entered the demonstration readiness to inform isochronous controller;
(4) after receiving that all digital film players enter the demonstration readiness, isochronous controller sends a synchronous triggering signal by the synchronizing signal transmission circuit to each digital film player;
(5) receive this synchronous triggering signal after, each digital film player is presented at first two field picture of pre-display buffer on separately the screen immediately, and before the follow-up demonstration time arrives, finishes all preparations that successive image shows; So circulation enters continuous broadcast state, realizes that the second level is synchronously smart.
3, two stage synchronous controlling method for multi-player digital film playing system according to claim 1 is characterized in that, Synchronization Control comprises following concrete steps:
(1) isochronous controller sends the order of playing given content successively or in the mode of broadcasting to digital film player;
(2) each digital film player is being received the preparation of playing after this order, comprise from storage medium and read cinematic data, decoding and the decoded data of at least one frame are inserted pre-display buffer, enter the demonstration readiness, realize that the first order is slightly synchronous;
(3) isochronous controller is waited for the sufficiently long time, enters the demonstration readiness to guarantee all digital film players;
(4) isochronous controller sends a synchronous triggering signal by the synchronizing signal transmission circuit to each digital film player;
(5) receive this synchronous triggering signal after, each digital film player is presented at first two field picture of pre-display buffer on separately the screen immediately, and before the follow-up demonstration time arrives, finishes all preparations that successive image shows; So circulation enters continuous broadcast state, realizes that the second level is synchronously smart.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20090259324A1 (en) * | 2008-04-11 | 2009-10-15 | Himax Technologies Limited | Broadcast devices |
| CN102176317B (en) * | 2011-01-14 | 2014-10-15 | 东软集团股份有限公司 | Method and system for realizing multi-screen playing frame level synchronization of passenger guidance system |
| CN102780785A (en) * | 2012-08-13 | 2012-11-14 | 广东威创视讯科技股份有限公司 | Multi-terminal synchronous display method, terminal and system |
| CN111741346A (en) * | 2019-03-20 | 2020-10-02 | 杭州海康威视数字技术股份有限公司 | Character superposition method and device, electronic equipment and computer readable storage medium |
| CN110677945A (en) * | 2019-09-24 | 2020-01-10 | 深圳市千百辉照明工程有限公司 | Synchronous terminal, LED light synchronous control method and system |
| CN110891178B (en) * | 2019-10-29 | 2022-05-24 | 瑞芯微电子股份有限公司 | Method and device for real-time rendering of video |
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| US5956046A (en) * | 1997-12-17 | 1999-09-21 | Sun Microsystems, Inc. | Scene synchronization of multiple computer displays |
| US20040046706A1 (en) * | 2001-06-15 | 2004-03-11 | In-Keon Lim | Method and apparatus for high-definition multi-screen display |
| CN1567470A (en) * | 2003-06-18 | 2005-01-19 | 分众多媒体技术（上海）有限公司 | Integrative synchronous liquid crystal display system for digital multifunctional optical disk |
| JP2005203948A (en) * | 2004-01-14 | 2005-07-28 | Seiko Epson Corp | Multi-screen video reproducing apparatus |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5956046A (en) * | 1997-12-17 | 1999-09-21 | Sun Microsystems, Inc. | Scene synchronization of multiple computer displays |
| US20040046706A1 (en) * | 2001-06-15 | 2004-03-11 | In-Keon Lim | Method and apparatus for high-definition multi-screen display |
| CN1567470A (en) * | 2003-06-18 | 2005-01-19 | 分众多媒体技术（上海）有限公司 | Integrative synchronous liquid crystal display system for digital multifunctional optical disk |
| JP2005203948A (en) * | 2004-01-14 | 2005-07-28 | Seiko Epson Corp | Multi-screen video reproducing apparatus |
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